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Finding the Fourth Proportional to 21,168.03, 31,766.63 and 7,317.03

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Solution

The fourth proportional to 21,168.03, 31,766.63 and 7,317.03 is: 10,980.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.03 : 31,766.63 = 7,317.03 : x
  2. Step 2: Convert to fraction form
    21,168.03/31,766.63 = 7,317.03/x
  3. Step 3: Cross multiply
    21,168.03x = 31,766.63 × 7,317.03
  4. Step 4: Simplify right side
    21,168.03x = 232,437,384.71
  5. Step 5: Solve for x
    x = 232,437,384.71/21,168.03
  6. Step 6: Final answer
    x = 10,980.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.